WO2023025425A1 - Appareil de filtration - Google Patents

Appareil de filtration Download PDF

Info

Publication number
WO2023025425A1
WO2023025425A1 PCT/EP2022/065381 EP2022065381W WO2023025425A1 WO 2023025425 A1 WO2023025425 A1 WO 2023025425A1 EP 2022065381 W EP2022065381 W EP 2022065381W WO 2023025425 A1 WO2023025425 A1 WO 2023025425A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
cleaning
discharge
coupling
partial
Prior art date
Application number
PCT/EP2022/065381
Other languages
German (de)
English (en)
Inventor
Hans-Jürgen Lingen
Original Assignee
Hydac Process Technology Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydac Process Technology Gmbh filed Critical Hydac Process Technology Gmbh
Priority to EP22733342.4A priority Critical patent/EP4334013A1/fr
Priority to CN202280051856.4A priority patent/CN117897214A/zh
Priority to KR1020247007274A priority patent/KR20240047990A/ko
Publication of WO2023025425A1 publication Critical patent/WO2023025425A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B01D29/232—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B01D2201/081—Regeneration of the filter using nozzles or suction devices
    • B01D2201/082—Suction devices placed on the cake side of the filtering element

Definitions

  • the invention relates to a filter device, at least consisting of a filter, which is divided into individual filter segments, a cleaning device, which has a partial cleaning unit that is assigned to each filter segment and can be moved along the same, which cooperates with a rotatable discharge device with individual discharge openings that communicate with passage points in the cleaning device brought in at least partially congruent the discharge of a fluid flow from the filter is used, and a control device which activates at least one partial cleaning unit for the cleaning, whereas at least one further partial cleaning unit remains inactive within the scope of this cleaning.
  • DE 42 08 743 C2 discloses an automatic backflushing filter for liquids, consisting of a filter housing with an inlet and a filtrate outlet as well as a sludge discharge, into which at least one or more multi-chamber nozzles arranged coaxially one above the other on a hollow drive shaft as cleaning device as partial cleaning units rotate in a cylindrical filter insert that serves as a filter and which is functionally divided into individual filter segments with regard to backwashing.
  • the known solution also has a control tube that serves as a discharge device, which is forced to rotate at different speeds to the multi-chamber nozzle, whereby its individual chambers are slowly controlled in such a way that a previous multi-chamber nozzle that served as a passive chamber is activated and the previous active chamber is closed at the same time, with the backflushing process is continued cyclically until all chambers were switched to active.
  • control pipe rotates continuously in the same direction and coaxially in the cleaning device with the multi-chamber nozzles, both are mounted coaxially in the filter insert, and the drive for the cleaning and the discharge device is a common one, the backwash volume flow, the absolute pressure drop as well as the pressure drop per unit of time is reduced in such a way that the backwashing processes can be carried out essentially with high intensity.
  • the known solution requires both an independent rotary drive both for the cleaning device and for the discharge device, each with an independent gear stage, which can, however, be actuated together by a single rotary drive, which requires a corresponding amount of space and due to the gear drive to be controlled, a lot of drive energy is required on the part of the Rotary drive regularly required in the form of an electric motor.
  • the invention is based on the object of further improving the known filter device in such a way that a space-saving design is achieved with an energy-efficient drive and improved cleaning.
  • a pertinent task is solved by a filter device having the features of patent claim 1 in its entirety. Due to the fact that, according to the characterizing part of patent claim 1, the control device has a coupling device which, in one position of the coupling device, connects the cleaning device to the discharge device for a common rotary movement and separates them from one another in another position of the coupling device, the solution according to the invention does not require a transmission gear , which enables a space-saving design.
  • a contributing factor here is that the coupling device mentioned is housed in a coaxial arrangement with the respective tubular cleaning device and discharge device, which is rotatably guided in the cleaning device and acts on both of these inside the basket-like filter. Furthermore, the coupling device allows a timely activation of both the cleaning device and the discharge device, so that the cleaning is improved overall in an energy-efficient manner.
  • the coupling solution that can be implemented cost-effectively preferably provides that in the coupled position the cleaning device is also driven by the discharge device and that in the uncoupled position the cleaning device remains in its last position and only the discharge device is permanently driven further.
  • a major advantage of the control device with clutch release is that the discharge device can be driven permanently, whereas the cleaning device is only driven intermittently by the clutch.
  • the possibility, in reverse order, of permanently driving the cleaning device and only intermittently driving the discharge device by means of the clutch so that both drive concepts can be implemented here, depending on the application.
  • the coupling device both on the top and on the bottom of the backwash on the Provide filter device so that a modular design concept can be implemented. This has no equivalent in the prior art.
  • the coupling device has a claw coupling as a control part, the claws of which engage with recesses in the cleaning device in the coupled position and are disengaged in the disengaged position.
  • a form-fitting connection is achieved within the framework of the coupling, which enables gentle coupling and uncoupling between the cleaning device and the discharge device.
  • the control device preferably has a further control part, which is part of the discharge device and which interacts with a control path of the coupling device in such a way that when the discharge device rotates, the coupling device comes into the disengaged position by being brought into a lifted position by the cleaning device .
  • the movement of the clutch device into the lifted position is preferably supported by an energy accumulator, so that unhindered operation of the clutch is achieved.
  • the partial cleaning units are arranged one above the other in a longitudinal axis of the cleaning unit, one free end of which can be moved along the filter segments and the other free end of which can be moved into the respectively assigned passage points of the at least partially hollow tube designed cleaning device.
  • the filter segments can form individual sub-units of a filter bowl.
  • the filter bowl is designed in one piece throughout and the structure according to filter segments results only from the function of the cleaning device with its individual partial cleaning units, which to this extent in each case travel over the inner circumference of the filter bowl in segments.
  • a further hollow tube is guided as part of the discharge device, the discharge openings of which are distributed over the circumference of the further hollow tube in such a way that one passage point with a discharge opening below Formation of a fluid passage is brought into congruence, whereas the other possible fluid passages are at least partially, preferably all, shut off.
  • This segmentation of the filter surface being backwashed increases the intensity of the backwash.
  • the existing "backwashing energy" is concentrated on a small filter surface, which means that this system enables finer filtration and, on the other hand, this system can manage with a lower backwashing quantity, which is good for the environment.
  • control path of the coupling device for controlling the partial cleaning units is divided into individual path segments, so that in the coupled state at least one fluid passage is always activated and after a decoupling-coupling cycle has been completed at least another Fluid passage is activated and each other fluid passages are disabled.
  • control device has a further third control part, which is designed as a pressure piece and holds the clutch device in its coupled position against the action of the energy store, and with a track segment of the clutch device cooperates in such a way that the pressure piece is disabled along a sheet segment, enabling the uncoupling process.
  • a resulting angular offset between the discharge device and the cleaning device during a shift or clutch operation corresponds to the predeterminable division angle of the discharge openings distributed over the tubular discharge device, so that the segments of the backflushing unit are activated one after the other.
  • the length of the arcuate segment in engagement with the pressure piece is dimensioned such that in the coupled state of the coupling device the fluid passage provided in the cleaning sequence is established between the cleaning device and the discharge device.
  • the filter device in a particularly preferred embodiment of the filter device according to the invention it is further provided that during a switching process between the coupled and uncoupled state of the coupling device there is a relative movement between the cleaning device and the discharge device, while the discharge device continues to rotate.
  • the radial discharge opening of the discharge device can be made longer than the respectively assignable passage point in the cleaning device. In this way, a predeterminable angle overlap is achieved, which ensures that the filter segment currently being backwashed continues to be cleaned during the relative movement between the two devices. In this respect, it is also ensured that the backwashed filter segment is cleaned over 360° and thus completely.
  • FIGS. 1 to 3 show a central longitudinal section through the filter device in various operating positions, with FIGS. 2 and 3 showing only parts of the filter device according to FIG. 1; and the
  • FIGS. 4 to 7 show different representations of a control device related to a clutch device used in FIGS. 1 to 3.
  • FIG. 1 shows an exemplary embodiment of the filter device according to the invention with a filter housing designated as a whole by 1, which has a main housing part 2 in the form of a pot, on whose bottom 3 there is a bearing point 5 coaxial with a central longitudinal axis 4 of the housing.
  • a lateral inlet 7 for the supply of unfiltrate is provided as access to the housing space 6 adjoining the base 3, so that the housing space 6 forms the unfiltrate side.
  • the main housing part 2 is closed by a housing cover 8 which is detachably attached by means of retaining screws and in which a bearing point 9 coaxial with the axis 4 is formed, as in the bottom 3 .
  • a filtrate outlet 10 is provided adjacent to the housing cover 8 opposite, which is arranged in a position aligned with the lateral inlet 7 and flows out via the filtrate from the adjacent housing space 11, which forms the clean or filtrate side during operation.
  • a backflushing filter assembly is located in the vicinity of the unfiltrate inlet 7, which is located above a step-forming wall shoulder 12 and is described as a whole with 13, which will be described in more detail below.
  • the structural unit 13 has a filter 14 in the form of a filter basket, which is accommodated in an end cap 15 and 16 on each of its free end faces.
  • the filter 14 is in the filter housing 1 and after removing the housing cover 8, the filter 14 can be removed from the housing 1.
  • the filter material of the filter 14 is accommodated between support bodies 17 and 18, the fluid passage points of the inner support body 18 being formed from slit-shaped window openings of an otherwise continuous cylindrical support body.
  • the filter medium of the filter 14 preferably consists of a pleated filter mat web consisting of at least one filter layer.
  • the filter 14 is functionally subdivided into individual filter segments and the structural unit 13 has a cleaning device 19 which, assigned to each filter segment, has a partial cleaning unit 20, 21 and 22 which can be moved along the same and which is equipped with a rotatable discharge device 23 with individual discharge openings 24, 25 and 26 interacts, which is at least partially overlapped with fluid-permeable passage points 27, 28 and 29 in the cleaning device 19 and serves to discharge a fluid stream from the filter 14.
  • Each partial cleaning unit 20, 21 and 22 forms a type of slit nozzle on its free front side, which is arranged rotatably by means of a flushing arm 30 as part of the cleaning device 19 in the form of a hollow tube along the inner peripheral side of the filter 14.
  • the filter 14 is flowed through from the inside to the outside and the particle contamination cleaned from the fluid is deposited on its inside. Due to the filtrate pressure in the housing chamber 11 on the clean or filtrate side, the deposited particle contamination is backwashed from the outside to the inside in the respective slot nozzle of a partial cleaning unit 20, 21 and 22 and reaches the so-called sludge discharge side via the hollow flushing arm 30, reaching through the lower eager point 5 31, which engages in the main housing part 2 opposite the housing space 6 from the bottom side.
  • the hollow tube of the flushing arm 30 is connected to the sludge discharge side 31 on the bottom side to carry media. As can also be seen from FIG.
  • the discharge device 23 with its discharge openings 24, 25 and 26 is guided within the hollow flushing arm 30 and is rotatably arranged in the hollow flushing arm 30, forming a type of switching tube 38 in cooperation with a control device designated as a whole with 40.
  • the output shaft 34 is permanently driven by the electric motor 33 and rotates continuously. Accordingly, the drive shaft 36 for the discharge device 23 also rotates continuously.
  • the associated switching tube 38 preferably formed from a piece of precision steel tubing, is freely rotatably mounted in the flushing arm 30 via a clearance fit.
  • the switching tube 38 is firmly connected to the drive shaft 36 via two parallel key pieces 44 lying diametrically opposite one another with respect to the longitudinal axis 4 and thus also rotates permanently with the operation of the electric motor 33 .
  • the two feather key pieces 44 protrude radially through the switching tube 38 laterally as shown in FIG.
  • the ring-shaped shift bushing 46 which includes the shift tube 38 with a central opening, is so far centered on the shift tube 38 and via the two feather key pieces 44 in a tangential positive connection to the shift tube 38 or to the Drive shaft 36 held. Due to the pertinent feather key guide, the shift sleeve 46 rotates continuously when the electric motor 33 is in operation.
  • a compression spring 48 arranged below the shift bushing 46 as viewed in the direction of FIG. 4 forms the energy store for the clutch device 42 as a whole and exerts an upward force on the shift bushing 46 .
  • the compression spring 48 is arranged with its one free end in a recess in the flushing arm 30 and is supported with its opposite other free end on a shoulder-like extension of the annular shift bushing 46 .
  • a hydraulic drive motor can also be used.
  • the contours on the upper side of the spray arm 30 and on the underside of the shift bushing 46 with the intended axial mobility of the shift bushing 46 along the longitudinal axis 4 form a switchable claw clutch 50 as a whole, which acts as a control part of the clutch device 42 can be seen, the further control part of the control device 40 or of the clutch device 42 being the feather key pieces 44 which form the sliding seat for the shift bushing 46 .
  • the rinsing arm 30 of the cleaning device 19 has on its upper side a pot-like indentation with individual webs 52, which delimit recesses 54 between them, viewed in the radial direction, which serve to accommodate claw-like projections 56, which are located on the underside of the shift bushing 56 protrude, and which have inwardly indented radial segments 58 between them, into which the webs 52 engage in the coupled position of the claw clutch 50 .
  • the clutch device 42 or the claw clutch 50 is engaged or switched and the flushing arm 30 is driven via the switching socket 46. If, on the other hand, the shift bushing 46 is displaced axially upwards under the action of the compression spring 48 and is not in a positive fit with the spray arm 30, the clutch device 42 is disengaged or not engaged, as shown in Figure 7, and the shift bushing 46 continues to rotate with the shift tube 38 the spray arm 30 stops.
  • an O-ring 60 is provided on the underside of the spray arm 30 in the area above the lower bearing point 5, as shown in FIG.
  • FIGS. 6 and 7 show in particular the interaction of the pressure piece 62 in the form of a ball roller with the compression spring 48 and the shift sleeve 46, with FIG. 6 showing the engaged clutch state and FIG. 7 showing the disengaged state. According to the representation in FIG.
  • the shift bushing 46 is pushed upwards by the compression spring 48, with the upper side of the shift bushing 46 being supported against the ball roller of the pressure piece 42, which is designed as a screw-in part and is firmly connected to the upper end cap 15.
  • the claw clutch 50 is engaged, so that the shift bushing 46 and the flushing arm 30 rotate together, with the shift bushing 46 taking the shift tube 38 with it in the rotary motion via the feather key pieces 44, as already explained.
  • the contour on the upper side of the shift sleeve 46 has a trough 64 which is divided into individual arcuate segments 66, with the central arcuate segment 66 forming the deepest point of the trough 64 and the other two arcuate segments 66 form start-up ramps for the axially immovable pressure piece 62, which, starting from the central arc segment 66, open outwards into a further arc segment 68, which forms a horizontal surface transverse to the longitudinal axis 4 and is therefore the highest start-up point for the pressure piece 62 within the shift sleeve 46 trains.
  • the trough 64 merges into the cylindrical area 68 of the shift bushing 46 via the bevels 66 mentioned.
  • the shift sleeve 46 is moved axially upwards by the compression spring 48 and the claw clutch 50 is then disengaged as shown in FIG.
  • the spray arm 30 is stationary; however, the switching tube 38 continues to rotate and a relative angular offset occurs between the spray arm 30 and the switching tube 38. If the switching sleeve 46 is moved downwards again by the pressure piece 62 as shown in FIG described above, to the desired form fit.
  • the angular offset between the switching tube 38 and the flushing arm 30 during a switching process corresponds to the division angle of the individual discharge openings 24, 25 and 26, which are arranged radially offset from one another in the switching tube 38 as an inner component of the cleaning device 23 with the associated passage points 27, 28 and 29 the individual segments of the backwash unit 10 are activated one after the other, which will be explained in more detail below.
  • the segmented structural solution of the backwash filter assembly 13 according to FIG. 1 shows the backwash over the lower segment that is kept active.
  • the backflushing unit 13 is divided into individual segments in the axial direction, with only one segment being traversed per revolution of the backflushing unit 13; 1 shows the lower segment, with the lower discharge opening 24 of the discharge device 23 covering the lower passage point 27 of the cleaning device 19, forming a fluid passage.
  • the other discharge openings and passage points of the switching tube 38 and flushing arm 30 are each around 120 degrees radially offset from one another and are therefore not usable for backwashing because the pipe wall of the cleaning device 19 covers the discharge openings 25, 26 of the discharge device 23.
  • the segmentation of the filter surface of the filter 14 that is currently being backwashed increases the intensity of the backwash and the available backwash energy is concentrated on a smaller filter surface. On the one hand, this means that finer filtration is possible with this system and, on the other hand, this system can work with less backwash volume.
  • the segmentation mentioned for the filter 14 is realized on the one hand by the fact that the flushing arm 30 has several separate flow channels due to its various passage points 27, 28 and 29, and on the other hand it is also provided that the switching tube 38 is located inside the flushing arm 30 , Which radially offset over the circumference discharge openings 24, 25 and 26 has, with a targeted relative angular offset of the switching tube 38 to the rinsing arm 30 of 120 degrees, the mentioned flow channels of the rinsing arm 30 are activated one after the other.
  • FIG. 2 shows a state in which the middle segment of the filter 14 is activated for backwashing, with the result that the middle, inner discharge opening 25 is in fluid-permeable coverage with the passage point 28 on the outside. The other discharge openings and passage points are then again separated from one another for a passage of fluid through the wall parts of the flushing arm 30 and the switching tube 38 .
  • FIG. 3 again shows the activation of the upper segment of the filter 14, in which the upper discharge opening 26 of the discharge device 23 is in a fluid-permeable position with the upper passage point 29 of the cleaning device 19.
  • the mechanical switching process within the backwash unit 13 by means of the control device 40 using the claw clutch 50 is required, whereby the arcuate segments 66 of the trough 64 with the horizontally running arcuate segment 68 are dimensioned from the track length in such a way that, in cooperation with the pressure piece 62, the switching cycles of 120 degrees angular offset from discharge openings 24, 25 and 26 to passage points 27, 28 and 29 are achieved.
  • the upper counter-bearing for the shift bushing 46 is a ball roller, which is arranged in the filter basket 14 .
  • the counter bearing can also be formed by other components, for example by a cam, a pin or the like.
  • the counter bearing can also be arranged on other fixed components in the filter, for example instead of on the upper one End cap 15 directly on the filter housing 1.
  • the concept of the switching mechanism can also be implemented using other forms of switchable clutches, for example using a friction clutch, a magnetic clutch, etc. With only two partial cleaning units, the angular offset is 180 degrees, with four partial cleaning units 90 degrees and so on .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un appareil de filtration constitué d'au moins - un filtre (14), qui est divisé en segments de filtre individuels, - un dispositif de nettoyage (19), qui comprend, associée à chaque segment de filtre, une unité de nettoyage partiel (20, 21, 22) qui peut être déplacée le long du dispositif de nettoyage et qui coopère avec un dispositif de retrait (23), et - un dispositif de commande (40), qui active au moins une unité de nettoyage partiel pour le nettoyage, tandis qu'au moins une autre unité de nettoyage partiel reste inactive pendant ce nettoyage, le dispositif de commande (40) comprenant un dispositif d'accouplement qui, dans une position du dispositif d'accouplement, relie le dispositif de nettoyage (19) au dispositif d'évacuation (23) pour un mouvement de rotation commun et, dans une autre position du dispositif d'accouplement, les sépare l'un de l'autre.
PCT/EP2022/065381 2021-08-24 2022-06-07 Appareil de filtration WO2023025425A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP22733342.4A EP4334013A1 (fr) 2021-08-24 2022-06-07 Appareil de filtration
CN202280051856.4A CN117897214A (zh) 2021-08-24 2022-06-07 过滤设备
KR1020247007274A KR20240047990A (ko) 2021-08-24 2022-06-07 필터 디바이스

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021004351.0A DE102021004351A1 (de) 2021-08-24 2021-08-24 Filtervorrichtung
DE102021004351.0 2021-08-24

Publications (1)

Publication Number Publication Date
WO2023025425A1 true WO2023025425A1 (fr) 2023-03-02

Family

ID=82196647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/065381 WO2023025425A1 (fr) 2021-08-24 2022-06-07 Appareil de filtration

Country Status (5)

Country Link
EP (1) EP4334013A1 (fr)
KR (1) KR20240047990A (fr)
CN (1) CN117897214A (fr)
DE (1) DE102021004351A1 (fr)
WO (1) WO2023025425A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611075A1 (de) * 1986-04-03 1987-10-08 Boll & Kirch Filter Rueckspuelfilter
DE4208743C2 (de) 1992-03-16 1995-09-14 Frank Dipl Ing Buehling Automatischer Rückspülfilter für Flüssigkeiten
DE202014104200U1 (de) * 2014-06-11 2015-09-14 Boll & Kirch Filterbau Gmbh Rückspülfilter und Filtereinsatz hierfür
DE202016003089U1 (de) * 2016-05-13 2016-06-02 Hydac Process Technology Gmbh Filtervorrichtung
DE102017001968A1 (de) 2016-10-12 2018-04-12 Hydac Process Technology Gmbh Filtervorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611075A1 (de) * 1986-04-03 1987-10-08 Boll & Kirch Filter Rueckspuelfilter
DE4208743C2 (de) 1992-03-16 1995-09-14 Frank Dipl Ing Buehling Automatischer Rückspülfilter für Flüssigkeiten
DE202014104200U1 (de) * 2014-06-11 2015-09-14 Boll & Kirch Filterbau Gmbh Rückspülfilter und Filtereinsatz hierfür
DE202016003089U1 (de) * 2016-05-13 2016-06-02 Hydac Process Technology Gmbh Filtervorrichtung
DE102017001968A1 (de) 2016-10-12 2018-04-12 Hydac Process Technology Gmbh Filtervorrichtung

Also Published As

Publication number Publication date
EP4334013A1 (fr) 2024-03-13
DE102021004351A1 (de) 2023-03-02
CN117897214A (zh) 2024-04-16
KR20240047990A (ko) 2024-04-12

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